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Poly-Fast 72-40 Liquid Mold Rubber
Poly-Fast 72-40 is a dense, medium hardness rubber used primarily for sculptural applications and investment casting with wax.
This room-temperature curing polyurethane mold rubber can be poured as supplied or thickened with liquid Poly-Fast 72 Part D, Fumed Silica or PolyFiber II. It can be softened with Poly-Fast 72 Part C to make rubbers softer than a Shore A10.
NOTE: Cured molds may degrade with age and should not be considered for molds where long shelf life is required. For rubber options that will not soften with age, consider Poly 74-Series polyurethane mold rubbers.
|Softener||Add Poly-Fast 72 Part C Softener to Poly-Fast 72-40 to create a softer rubber.|
|Accelerator||Add Poly 74/75 Part X Accelerator to Poly-Fast 72-40 products to accelerate the cure.|
|Thickeners||Use Poly-Fast 72 Part D Thickener, a liquid thickener, to thicken Poly-Fast 72-40. PolyFiber II or Fumed Silica are additional thickening options.|
|Reinforcement Materials for Blanket Molds||Use Tietex® Fabric to reinforce blanket molds.|
|Product Life Extender||Use PolyPurge Aerosol Dry Gas to extend product life by spraying it into containers before resealing.|
|UV Stabilizer||Use UV additive to help reduce the characteristic surface degradation caused by sunlight.|